/*
 * Copyright 2006-2018 The MZmine 2 Development Team
 * 
 * This file is part of MZmine 2.
 * 
 * MZmine 2 is free software; you can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 * 
 * MZmine 2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with MZmine 2; if not,
 * write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
 * USA
 */

package net.sf.mzmine.util.components;

import java.text.DecimalFormat;
import java.text.NumberFormat;

import javax.swing.table.DefaultTableCellRenderer;

/**
 * Simple table cell renderer that renders percentage instead of double values
 */
public class PercentageCellRenderer extends DefaultTableCellRenderer {

  /**
   * 
   */
  private static final long serialVersionUID = 1L;
  private final NumberFormat percentFormat;

  public PercentageCellRenderer() {
    this(0);
  }

  public PercentageCellRenderer(int decimals) {

    assert decimals >= 0;

    if (decimals == 0) {
      percentFormat = NumberFormat.getPercentInstance();
    } else {
      StringBuilder pattern = new StringBuilder("0.");
      for (int i = 0; i < decimals; i++)
        pattern.append("0");
      pattern.append("%");
      percentFormat = new DecimalFormat(pattern.toString());
    }

  }

  protected void setValue(Object value) {
    if ((value == null) || (!(value instanceof Double))) {
      super.setValue(value);
    } else {
      String formatted = percentFormat.format((Double) value);
      super.setValue(formatted);
    }
  }

}
